Convert Square Perch to Square Yard
Convert square perches to square yards instantly. 1 square perch = 30.25 square yard — use the live calculator, the exact formula, a conversion table and worked examples. Also check the Square Yard to Square Perch converter for the reverse conversion.
Units explained
Square Perch
A square perch is identical to a square rod, equal to approximately 25.293 m². 'Perch' is the older English regional name for the same unit.
Identical in value to square rod and square pole; differs only in regional naming preference. 'Perch' is more commonly used in British and Irish historical contexts.
Square perches survive in some historical British property records, particularly in Ireland where the unit had legal status until the metric transition.
Standardized via the 1959 International Yard and Pound Agreement.
Square Yard
A square yard is an imperial unit of area equal to exactly 0.83612736 m². It is used for carpet, fabric, paving, and some landscaping measurements.
Derived by squaring the yard (3 feet). The yard was standardized to exactly 0.9144 m via the 1959 International Yard and Pound Agreement.
Square yards are used in carpeting (US and UK), fabric retail, paving (UK, US, India), and landscape gardening. In India, square yards are sometimes used in legal property documents.
Yard dates to medieval English usage; modern exact value standardized in 1959.
Square Perch to Square Yard conversion formula
The relationship between square perches and square yards:
To convert square perches to square yards, multiply the value in square perches by 30.25. To reverse, multiply square yards by 0.0330578512.
How to use this converter
Type a value into the calculator. The result in square yards updates as you type. Tap a quick value, copy the result with one click, or use the swap arrow to jump straight to the Square Yard to Square Perch converter for the reverse direction.
Step-by-step: convert square perches to square yards
- Write down the value in square perches (perch²).
- Multiply that value by the factor 30.25.
- The product is the equivalent value in square yards (yd²).
- To reverse, multiply the square yard value by 0.0330578512.
Worked examples
Example 1 — Convert 1 perch² to yd²:
1 × 30.25 = 30.25 yd²
Example 2 — Convert 100 perch² to yd²:
100 × 30.25 = 3025 yd²
Square Perch to Square Yard conversion table
Standard reference values for converting square perches to square yards:
| Square Perch [perch²] | Square Yard [yd²] |
|---|---|
| 0.01 | 0.3025 |
| 0.1 | 3.025 |
| 1 | 30.25 |
| 2 | 60.5 |
| 3 | 90.75 |
| 4 | 121 |
| 5 | 151.25 |
| 10 | 302.5 |
| 20 | 605 |
| 30 | 907.5 |
| 40 | 1210 |
| 50 | 1512.5 |
| 100 | 3025 |
| 500 | 15125 |
| 1000 | 30250 |
Frequently asked questions
How many square yards is 1 square perch?
How do I convert square perches to square yards?
How do I convert square yards back to square perches?
How many square yards is 100 square perches?
Popular area unit conversions
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Metric / SI (5 units)
Imperial / US Customary (14 units)
Sources & references
Conversion factor (1 perch² = 30.25 yd²) verified against the following authoritative sources:
- BIPM — The International System of Units (SI Brochure 9th ed.)
Official BIPM publication defining the seven SI base units (including the meter) and the rules for their use. The global authority on units of measurement.
- NIST — Guide to the SI
US National Institute of Standards and Technology reference covering the SI base and derived units with definitions and usage rules for US technical practice.
- NIST Special Publication 811 — Guide for the Use of the International System of Units
Detailed NIST guide covering exact conversion factors between SI and US customary units along with formatting and rounding conventions.
- NIST — Refinement of values for the yard and pound (Federal Register 1959)
The treaty (signed by US
- International Astronomical Union — System of Astronomical Constants
The IAU defines astronomical units including the AU (149597870700 m exactly) light-year and parsec used in astronomy and astrophysics.